# Profoto B10 Plus OCF Flash Head vs Westcott FJ400 Strobe 400Ws with AC/DC Battery: specs and price compared

A sourced, side-by-side comparison of the Profoto B10 Plus OCF Flash Head (Profoto) and Westcott FJ400 Strobe 400Ws with AC/DC Battery (Westcott) among studio strobes. Westcott FJ400 Strobe 400Ws with AC/DC Battery is the cheaper of the two at $349.45.

## Side by side

| Spec | Profoto B10 Plus OCF Flash Head | Westcott FJ400 Strobe 400Ws with AC/DC Battery |
| --- | --- | --- |
| US price | $2095 | $349.45 |
| Brand | Profoto | Westcott |
| Power output ws | 500 | 400 |
| Flash duration t01 | as fast as 1/50000 sec in Freeze mode; 1/3400 sec best case in Normal mode | Normal mode 1/280-1/3000 sec; Freeze mode 1/280-1/7000 sec |
| Recycle time s | 0.05-2.46 | 0.05-0.9 |
| Ttl hss support | TTL (Canon, Nikon, Sony, Fujifilm via Profoto AirTTL/Air Remote); HSS to 1/8000s | TTL; HSS to 1/8000s; Rear Curtain Sync |
| Modeling lamp (W) | 150W-equivalent LED (2500 lm max, dimmable 10-100%) | 20 |
| Color temperature k | 3000-6500 adjustable LED modeling light (±500K); flash tube ~5500K | 5500 |
| Power source | Built-in rechargeable lithium-ion battery (up to 200 full-power flashes, or 75 min continuous LED use) | Removable 14.8V/4400mAh lithium-polymer battery (480+ full-power flashes) or AC power |

## Key differences

- Power output ws: Profoto B10 Plus OCF Flash Head 500 vs Westcott FJ400 Strobe 400Ws with AC/DC Battery 400
- Flash duration t01: Profoto B10 Plus OCF Flash Head as fast as 1/50000 sec in Freeze mode; 1/3400 sec best case in Normal mode vs Westcott FJ400 Strobe 400Ws with AC/DC Battery Normal mode 1/280-1/3000 sec; Freeze mode 1/280-1/7000 sec
- Recycle time s: Profoto B10 Plus OCF Flash Head 0.05-2.46 vs Westcott FJ400 Strobe 400Ws with AC/DC Battery 0.05-0.9
- Ttl hss support: Profoto B10 Plus OCF Flash Head TTL (Canon, Nikon, Sony, Fujifilm via Profoto AirTTL/Air Remote); HSS to 1/8000s vs Westcott FJ400 Strobe 400Ws with AC/DC Battery TTL; HSS to 1/8000s; Rear Curtain Sync
- Modeling lamp (W): Profoto B10 Plus OCF Flash Head 150W-equivalent LED (2500 lm max, dimmable 10-100%) vs Westcott FJ400 Strobe 400Ws with AC/DC Battery 20
- Color temperature k: Profoto B10 Plus OCF Flash Head 3000-6500 adjustable LED modeling light (±500K); flash tube ~5500K vs Westcott FJ400 Strobe 400Ws with AC/DC Battery 5500
- Power source: Profoto B10 Plus OCF Flash Head Built-in rechargeable lithium-ion battery (up to 200 full-power flashes, or 75 min continuous LED use) vs Westcott FJ400 Strobe 400Ws with AC/DC Battery Removable 14.8V/4400mAh lithium-polymer battery (480+ full-power flashes) or AC power

## Sources

- Profoto B10 Plus OCF Flash Head: https://profoto.com/us/products/lights/monolights/profoto-b10-plus-us/techspecs (profoto.com, verified 2026-08-09)
- Westcott FJ400 Strobe 400Ws with AC/DC Battery: https://www.fjwestcott.com/products/fj400-strobe-400ws-with-ac-dc-battery (fjwestcott.com, verified 2026-08-09)

Canonical: https://frontdeskreview.com/gear/studio-strobes/profoto-b10-plus-vs-westcott-fj400/
Cite: Per The Front Desk Review, Profoto B10 Plus OCF Flash Head ($2095) vs Westcott FJ400 Strobe 400Ws with AC/DC Battery ($349.45) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/studio-strobes/profoto-b10-plus-vs-westcott-fj400/
License: CC BY 4.0.